Experts - any discernable difference between PC7424 and PC7336?

Yeah, the counterweight and the supplied backing plate are the only differences. I have both and now that I've swapped the weights (both now use the 6" counterweight with all backing plates/pads) and plates there's no way to tell which is which.
 
Accumulator said:
Yeah, the counterweight and the supplied backing plate are the only differences. I have both and now that I've swapped the weights (both now use the 6" counterweight with all backing plates/pads) and plates there's no way to tell which is which.
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Have you determined that the bigger the pad, the gentler it is? I've seen many exchanges on other forums about whether smaller pads make more heat than bigger pads and therefore more aggressive, but some say that it's bigger pads that can damage paint more easily than smaller. I think the reasoning is that for a given rotation speed, the bigger the pad, the faster the speed that the outer pad section goes past the surface (and therefore more heat). But then some say that the smaller the pad, the greater the heat retained because of the smaller area. Or is it the pad material itself that matters (i.e. yellow, orange, white etc).



It's all so confoosing....
 
Bebopp said:
Have you determined that the bigger the pad, the gentler it is? I've seen many exchanges on other forums about whether smaller pads make more heat than bigger pads and therefore more aggressive, but some say that it's bigger pads that can damage paint more easily than smaller. I think the reasoning is that for a given rotation speed, the bigger the pad, the faster the speed that the outer pad section goes past the surface (and therefore more heat). But then some say that the smaller the pad, the greater the heat retained because of the smaller area. Or is it the pad material itself that matters (i.e. yellow, orange, white etc).



It's all so confoosing....
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on a PC the smaller the pad the more aggressive it is



on a Rotary the larger the pad the more aggressive
 
My first pc was a 7336 so it was weird to me when i used a 7224 w/supplied cw and bp. I prefer the 7224's smaller setup as it's more aggressive, I feel there's a big difference and I was pretty much killing myself with larger pads and bp my first 25 polish jobs.
 
BigJimZ28 said:
on a PC the smaller the pad the more aggressive it is



on a Rotary the larger the pad the more aggressive
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Why is this? Is it because of the random orbit thing, that a rotary doesn't have which cause more heat build-up, or is it the speed?
 
Bebopp said:
Why is this? Is it because of the random orbit thing, that a rotary doesn't have which cause more heat build-up, or is it the speed?
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The PC gets overwhelmed with large pads (note that it was meant to work with a single sheet of sandpaper, not a big foam pad wet with product). Those little 4" pads are a lot closer to the single sheet of sandpaper and thus more like what the PC was designed to work with. With smaller pads you can apply a lot of pressure without the PC bogging and also the PC's efforts are concentrated on a smaller area.



With a rotary, the larger the pad the faster the outer portion of it spins (it goes farther in the same period of time with every revolution). This becomes the significant factor, overshadowing the concentration of effort thing mentioned previously (which I suspect is more significant with random orbital motions than rotating motions anyhow).
 
Accumulator said:
The PC gets overwhelmed with large pads (note that it was meant to work with a single sheet of sandpaper, not a big foam pad wet with product). Those little 4" pads are a lot closer to the single sheet of sandpaper and thus more like what the PC was designed to work with. With smaller pads you can apply a lot of pressure without the PC bogging and also the PC's efforts are concentrated on a smaller area.



With a rotary, the larger the pad the faster the outer portion of it spins (it goes farther in the same period of time with every revolution). This becomes the significant factor, overshadowing the concentration of effort thing mentioned previously (which I suspect is more significant with random orbital motions than rotating motions anyhow).
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Perfect explanation!;)
 
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